<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
</head>
<body>
    <form action="${pageContext.request.contextPath}/sayHello" method="post">
        姓名：<input type="text" name="name"/><br/>
        <input type="submit" value="提交"/>
    </form>
</body>
</html>